rust.lua

local bufnr = vim.api.nvim_get_current_buf()

local on_attach = function (_, _bufnr)
    -- require 'lsp_signature'.on_attach(signature_setup, _bufnr)

    local nmap = function (keys, func, desc)
        if desc then
            desc = 'LSP: ' .. desc
        end
        vim.keymap.set('n', keys, func, { buffer = _bufnr, desc = desc })
    end

    local imap = function (keys, func, desc)
        if desc then
            desc = 'LSP: ' .. desc
        end
        vim.keymap.set('i', keys, func, { buffer = _bufnr, desc = desc })
    end

    nmap('<leader>rn', vim.lsp.buf.rename, '[R]e[n]ame')
    nmap('<leader>la', vim.cmd.RustLsp('codeAction'), '[C]ode [A]ction')

    nmap('gd', require('telescope.builtin').lsp_definitions, '[G]oto [D]efinition')
    nmap('gr', require('telescope.builtin').lsp_references, '[G]oto [R]eferences')
    nmap('gI', require('telescope.builtin').lsp_implementations, '[G]oto [I]mplementation')
    nmap('<leader>D', vim.lsp.buf.type_definition, 'Type [D]efinition')
    nmap('<leader>ds', require('telescope.builtin').lsp_document_symbols, '[D]ocument [S]ymbols')
    nmap('<leader>ws', require('telescope.builtin').lsp_dynamic_workspace_symbols, '[W]orkspace [S]ymbols')

    -- See `:help K` for why this keymap
    nmap('K', vim.lsp.buf.hover, 'Hover Documentation')
    nmap('<C-k>', vim.lsp.buf.signature_help, 'Signature Documentation')
    imap('<C-k>', vim.lsp.buf.signature_help, 'Signature Documentation')

    -- Format code
    nmap('<space>lf', function () vim.lsp.buf.format { async = true } end, 'Format')

    -- Lesser used LSP functionality
    nmap('gD', vim.lsp.buf.declaration, '[G]oto [D]eclaration')
    nmap('<leader>wa', vim.lsp.buf.add_workspace_folder, '[W]orkspace [A]dd Folder')
    nmap('<leader>wr', vim.lsp.buf.remove_workspace_folder, '[W]orkspace [R]emove Folder')
    nmap('<leader>wl', function ()
        print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
    end, '[W]orkspace [L]ist Folders')

    -- Create a command `:Format` local to the LSP buffer
    vim.api.nvim_buf_create_user_command(bufnr, 'Format', function (_)
        vim.lsp.buf.format()
    end, { desc = 'Format current buffer with LSP' })
end

vim.g.rustaceanvim = {
    -- Plugin configuration
    tools = {
    },
    -- LSP configuration
    server = {
        on_attach = on_attach,
        default_settings = {
            ['rust-analyzer'] = {
                cargo = {
                    allFeatures = true,
                },
                -- diagnostics = {
                --     enable = true;
                -- }
            },
        },
    },
    -- DAP configuration
    dap = {
    },
}